/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package Controller;

import Model.SupportUtil;
import Model.XMLUtils;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.logging.Level;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import org.apache.avalon.framework.logger.ConsoleLogger;
import org.apache.avalon.framework.logger.Logger;
import org.apache.fop.apps.Driver;
import org.apache.fop.apps.FOPException;
import org.xml.sax.InputSource;

/**
 *
 * @author ket
 */
public class PrintPDF extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try {
            String realPath = getServletContext().getRealPath("/");
            String action = request.getParameter("btAction");
            if (action.equals("printPDF")) {
                String foPath = realPath + "FO/MngOrderFO.fo";
                String xslPath = realPath + "xsl/MngOrderFO.xsl";
                String xmlPath = realPath + "XML/listOrder.xml";
                methodTrAX(xslPath, xmlPath, foPath);
                File file = new File(foPath);
                FileInputStream input = new FileInputStream(file);
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                response.setContentType("application/pdf");

                Driver driver = new Driver(new InputSource(input), out);
                Logger log = new ConsoleLogger(ConsoleLogger.LEVEL_WARN);

                driver.setRenderer(Driver.RENDER_PDF);
                driver.run();
                byte[] content = out.toByteArray();
                response.setContentLength(content.length);
                response.getOutputStream().write(content);
                response.getOutputStream().flush();
            }
        } catch (FOPException ex) {
            java.util.logging.Logger.getLogger(PrintPDF.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
        }
    }

  
    private void methodTrAX(String xslPath, String xmlPath, String output) throws FileNotFoundException {
        try {
            TransformerFactory tf = TransformerFactory.newInstance();
            StreamSource xstlFile = new StreamSource(xslPath);
            Transformer trans = tf.newTransformer(xstlFile);
            StreamSource xmlFile = new StreamSource(xmlPath);
            StreamResult htmlFile = new StreamResult(new FileOutputStream(output));
            trans.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
            trans.transform(xmlFile, htmlFile);
        } catch (TransformerConfigurationException ex) {
            ex.printStackTrace();
        } catch (TransformerException ex) {
            ex.printStackTrace();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
